Compare the 2013 John Deere High Performance HPX Diesel 4x4 vs 2013 John Deere Gator RSX 850i vs 2013 John Deere Gator RSX 850i Sport. The 2013 John Deere High Performance HPX Diesel 4x4 has an MSRP of $10,799, while the 2013 John Deere Gator RSX 850i has an MSRP of $12,999, 2013 John Deere Gator RSX 850i Sport has an MSRP of $15,499.